5 syllables: ir, ra, di, a, ted. Stress on ra.
ir-AY-dee-ay-tid
/ˌɪˈɹeɪdiˌeɪtɪd/
irradiated is pronounced ir-AY-dee-ay-tid (/ˌɪˈɹeɪdiˌeɪtɪd/). It has five syllables (ir-ra-di-a-ted), with the stress on "ra". irradiated describes something exposed to radiation or to be treated with radiation. It conveys a process or state resulting from exposure, often implying altered properties or safety considerations. The term is commonly used in scientific, medical, and safety contexts and can carry technical nuance about dose, exposure method, and resultant effects.
irradiated describes something exposed to radiation or to be treated with radiation. It conveys a process or state resulting from exposure, often implying altered properties or safety considerations. The term is commonly used in scientific, medical, and safety contexts and can carry technical nuance about dose, exposure method, and resultant effects.
"The lab samples were irradiated to sterilize them before testing."
"Patients receiving irradiation therapy are monitored closely for side effects."
"The building’s interior panels were irradiated to reduce microbial growth."
You say it as /ˌɪr.iˈdeɪ.tɪd/ (US/UK/AU share the same primary stress pattern). Emphasize the second syllable: ir-RAY-dee-ATE-d with tertiary light stress on the first syllable. Start with a short 'i' as in 'bit', then a rapid 'ri' blend, followed by a clear 'day' vowel 'deɪ', and end with a quick 'tid' (tɪd). It sounds like ir-ri-AI-ted with primary stress on the third syllable 'deɪ'.
Common errors include flattening the middle 'deɪ' into a quick 'day' with insufficient vowel height, and misplacing the primary stress on the first or second syllable instead of the third. Some speakers mishandle the ending 'ɪtɪd' by running the t into a d sound too slowly, making the word feel choppy. Focus on sustaining the /deɪ/ diphthong and crisp ending /təd/.
In General American, you’ll hear rhotic r-influenced vowels and a clearer /ɹ/ onset; the /deɪ/ remains a strong diphthong. UK speakers often reduce the rhotic quality and may lengthen the /ɪ/ before the final /dəd/ cluster slightly; the /t/ can be softer, with a mild glottalization in some dialects. Australian pronunciation tends toward a more even vowel approximation and a slightly shorter /ɪ/ in the final syllables, with a crisp but less forceful /t/.
Two main challenges are the multi-syllabic stress pattern and the /ɪ/ vs /iː/ distinction within the final cluster. The secondary stress lands on the middle syllable, which can be easy to overlook, leading to a mis-timed emphasis. The /deɪ/ diphthong demands a precise glide from /e/ to /ɪ/ while keeping the final /tɪd/ crisp. Practicing with slow, exaggerated articulation helps solidify the rhythm and reduces slurring.
Think of it as ir-ri-AY-ted, with a clear, prominent /AY/ in the third syllable. Visualize your mouth widen into a small smile for /deɪ/ and snap the final /tɪd/ with a short burst of air. Keeping the tongue relaxed after /deɪ/ prevents a trailing, murmured /əd/ and helps the entire word stay even in speed. Practice phrases like 'gamma-irradiated samples' to feel the rhythm.
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Irradiated comes from the verb phrase irradiate, formed from the combination of the prefix in- (in-, on) with radi- (ray, light, radiation) and the agentive suffix -ate, which indicates causing or making. The radi- root traces to Latin radi- meaning ray, which itself stems from the verb range related to radi- meaning to throw or emit rays. In English, irradiate appeared in the late 19th to early 20th centuries as scientific language expanded around radioactivity and medical radiation therapies. Early usage often described materials or biological subjects exposed to radiation. Over time, the term broadened to encompass various forms of exposure to energetic radiation, including gamma, X-ray, ultraviolet, and neutron irradiation, and increasingly to processes used for sterilization, treatment, or material modification. First known uses appear in scientific journals and manuals documenting experimental protocols and safety standards. Today, irradiated is commonly encountered in medical oncology, radiobiology, materials science, and environmental safety contexts, often accompanied by quantitative descriptors of dose and exposure duration.
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💡 These words have similar meanings to "irradiated" and can often be used interchangeably.
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Words that rhyme with "irradiated"
-ted sounds
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